Question

我决定和Django玩一下（因为我已经听过很多关于它的消息）。我正在阅读这里的教程：

http://docs.djangoproject.com/en/1.2/intro/tutorial01/#intro-tutorial01

大约一半的教程，我被要求从命令行运行：

python manage.py syncdb

但是，我收到了这个错误：

C:\django-projects\mysite>python manage.py syncdb
Traceback (most recent call last):
  File "manage.py", line 11, in <module>
    execute_manager(settings)
  File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line 438, in execute_manager
    utility.execute()
  File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line 257, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line 67, in load_command_class
    module = import_module('%s.management.commands.%s' % (app_name, name))
  File "C:\Python25\lib\site-packages\django\utils\importlib.py", line 35, in import_module
    __import__(name)
  File "C:\Python25\lib\site-packages\django\core\management\commands\syncdb.py", line 7, in <module>
    from django.core.management.sql import custom_sql_for_model, emit_post_sync_signal
  File "C:\Python25\lib\site-packages\django\core\management\sql.py", line 5, in <module>
    from django.contrib.contenttypes import generic
  File "C:\Python25\lib\site-packages\django\contrib\contenttypes\generic.py", line 6, in <module>
    from django.db import connection
  File "C:\Python25\lib\site-packages\django\db\__init__.py", line 75, in <module>
    connection = connections[DEFAULT_DB_ALIAS]
  File "C:\Python25\lib\site-packages\django\db\utils.py", line 91, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "C:\Python25\lib\site-packages\django\db\utils.py", line 32, in load_backend
    return import_module('.base', backend_name)
  File "C:\Python25\lib\site-packages\django\utils\importlib.py", line 35, in import_module
    __import__(name)
ValueError: Empty module name

这是我的setup.py

的相关部分

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3.', # Add 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': 'c:/python25/ramysDB',                      # Or path to database file if using sqlite3.
        'USER': '',                      # Not used with sqlite3.
        'PASSWORD': '',                  # Not used with sqlite3.
        'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
        'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
    }
}

Answer 1

我收到此错误是因为settings.py中列出了一个不存在的Django应用程序名称，在我们的示例中，它是空字符串：

INSTALLED_APPS = (
...
''
)

删除那一行解决了问题。

Answer 2

看起来您没有正确配置数据库。检查您的settings.py并确保您定义了有效的数据库ENGINE：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.', # Add 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': '',                      # Or path to database file if using sqlite3.
        'USER': '',                      # Not used with sqlite3.
        'PASSWORD': '',                  # Not used with sqlite3.
        'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
        'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
    }
}

你可能想要django.db.backends.sqlite3？并为它设置一个名称。

<强>更新

您在ENGINE中有一段额外的时间。将其更改为“django.db.backends.sqlite3”。希望有所帮助。

Answer 3

在settings.py

中的“INSTALLED_APPS”处添加应用名称

设置Django的问题 - ValueError：空模块名称

3 个答案: